A gene bank is a repository used to preserve genetic material for the future. Gene banks are not a modern concept -- the idea dates back thousands of years. Tune in as Allison and Robert explore gene banks, from Noah's Ark to the Doomsday Vault.

To forensic scientists, a bloodstain is more than just a grisly ornament at a crime scene -- so what exactly do they do with it? Turn in and learn more about bloodstain pattern analysis in this episode.

Let's say you're an astronaut: Each day you wake up, conduct research and make adjustments to your orbit. Eventually you grab some chow -- but what kind of food do you eat, and why? Join Robert and Allison as they explore the science behind space food.

When drug dealers want to grow marijuana without getting caught, they often set up a "grow house." These buildings look like any other building, and they often fool bystanders. Tune in and learn how to tell if your neighbors are running a grow house.

Most city dwellers are familiar with contaminated water and smoggy air -- but have you heard of light pollution? Listen in as Allison and Robert explore the effects of light pollution -- and whether humans are better off in the dark.

Since helium-3 can be used to power the fusion reactors of the future, it may be one of the world's most important fuel sources. It's rare on Earth, but experts believe the moon may have an abundant supply. Tune in and learn more about moon mining.

During 1986, an unusual thing happened in Cameroon: Lake Nyos exploded, expelling a toxic cloud that killed roughly 1700 people. How could this happen? More importantly, could it happen again? Learn more about exploding lakes in this episode.

Asteroid impacts are inevitable. As they hurtle toward Earth, experts race against the clock to build an effective asteroid deterrent. Will they succeed in time? Learn more about asteroid fighters -- and their plans to save the world -- in this episode.

From hordes of caterpillars in Liberia to the Australian mice plagues, infestations can occur in almost any part of the world. Join Robert and Allison as they explore some of the world's largest -- and strangest -- infestations.